Worth



UNITED STATES PATENT OFFICE.

JAMES W. DRAPER, FREDERICK DRAPER, AND \VALTER ELLSWVORTH, OF ALDEN,IOWA.

WELL-DRILLING MACHINE.

SPECIFICATION forming part of Letters Patent No. 481,482, dated August23, 1892.

Application filed January 13, 1892. Serial No. 417,956. (No model.)

To all whom it may concern:

Be it known that we, JAMES V. DRAPER, FREDERICK DRAPER, and WALTER ELLs-WORTH, all of Alden, in the county of Hardin and State of Iowa, haveinvented a new and Improved Well-Drilling Machine, of which thefollowing is a full, clear, and exact description.

The object of the invention is to provide a new and improved Welldrilling machine, which is simple and durable in construction, veryeffective in operation, and arranged to be operated at a high rate ofspeed.

Theinvention consists of certain parts and details and combinations ofthe same, as will be fully described hereinafter, and then pointed outin theclaim.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a front view of the improvement with parts in section. Fig.2-is a sectional side elevation of the same on the line 2 2 of Fig. 1,and Fig. 3 is a sectional end View of the locking mechanism for thehoisting-drum on the line 3 3 of Fig. 2.

The improved drilling-machine is mounted on a suitably-constructedderrick having a base A and standards B. On the base A is journaled insuitable bearings the main driving-shaft 0, connected with suitablemachinery for imparting a rotary motion to the said shaft. On the innerend of the shaft O is secured a crank-disk D, having a wrist-pinconnected by a pitman E with a Wrist-pin held in a clamp F, adapted tobe clamped on a walking-beam G, fulcruined at G on one of the standardsB and engaging with its free end a guideway G attached to the otherstandard. The clamp F may be fastened at any desired point along theWalking-beam G, so as to increase or decrease the stroke of thewalkingbeam, it being understood that if the clamp F is placed nearerthe pivot-point G the stroke is increased, and when placed near its freeend the stroke is diminished.

On the walking-beam G is adapted to be clamped a second clamp H,pivotally connected with an arm of a frame I, carrying a sheave J, underwhich passes a rope K, ex-

tending upward and passing over a sheave L, held in a frame N, hung on ashaft N, secured in the standard B, the upper end of the said frame Nbeing provided with segmental slotted arms N engaged by bolts 0, held inthe standards B and serving to secure the free end of the pivoted frameN in place, so as to bring the sheave L in proper position relative tothe sheave J and the drilling-tools supported on that end of the rope Kextending downward from the sheave L in the rear of the standards B. Therope K also extends from the sheave J upward over a pulley P, journaledin a suitable frame P, attached to one of the standards B. The rope Kthen extends downward from the pulley P and passes over a second pulleyQ, journaled in a frame Q, mounted to turn on a bolt Q held in the baseA. The rope extends from the pulley Q upward and winds upon a drum R ofa hoisting device S, the frame of which is attached to the base A, atone side thereof.

On one end of the drum R is secured a gear-wheel R, in mesh with apinion R held on a shaft T, journaled in suitable bearings in the frameof the hoisting device. S, the outer end of the said shaft T beingprovided with a suitable crank-arm T for conveniently turning the saidshaft T, so as to impart by the pinion R and gear-wheel R a rotarymotion to the drum R to wind up or unwind the rope K, as hereinaftermore fully described.

On the shaft T is secured a toothed wheel U, adapted to be engaged by asliding pawl U, mounted to slide vertically in a casing U secured to oneof the standards of the frame of the hoisting device S. Aspring Upresses on the pawl U, so as to hold the same in engagement with thetoothed wheel U, thereby locking the latter, and consequently the shaft'1, in position. The spring U is inclosed in the casing U as is plainlyshown in Fig. 2. The upper end of the pawl U is made in the shape of ahandle, so that the operator can conveniently move the pawl in an upwarddirection to disengage the same from the toothed wheel U to permit ofturning the shaft T.

The operation is as follows: When the main shaft 0 is set in motion, aswinging motion is imparted to the walking-beam G, so that an Ilowermost position the drilling-tools drop suddenly, exerting by theirweight a heavy pull on the rope K, sheave J, frame I, clamp H,andwalking-beam G, so that the latter quickly flies upward, drawing theclamp F and pitman E in the same direction. This operation isrepeatedthat is, on the downward stroke of the walking-beam the toolsare lifted, and when the wrist-pin of the crankdisk D has passed itslowermost position the drilling-tools are quickly dropped. Now when itisdesired to put out more rope K to lower the drillingtools the operatorwithdraws the pawl U from the toothed wheel Uand then turns the crankarmT to unwind the ropeK from the drum R. It is understood that as muchrope is unwound from the drum R as is necessary to constitute the properfeed. Thepawl U is then again engaged with the toothed wheel U, so thatthe drum of the hoisting device is locked in place. It will be seen thatthe amount of lift and drop given to the drilling-tools can beconveniently regulated by adjusting the clamps F and H on thewalking-beam G in the manner above described. The frame N,

carrying the sheave L, can also be adjusted longitudinally, so as tobring the rope K in the proper position relative to the well to bedrilled and to the sheave J. It will further be seen that by fasteningthe rope overthe pulleys P and Q before winding the same on the drum Rthe heavy strain is taken oif the said drum, and consequently ofi thehoisting device, when lifting the tools.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent A well-drilling machine comprising a frame orbase, a derrick projecting upwardly therefrom,a drive-shaft mounted onthe frame, a vertically rocking walking beam mounted transversely on thederrick above the inner end of the drive-shaft and operated therefrom, apulley J, adj ustably connected with the walking-beam, a frame N,pivoted in the upper end of the derrick and having slotted arms throughwhich pass adj usting-bolts, a pulley L, mounted in said frame, a pulleyP, mounted on the derrick intermediate of pulleys J L, a winding-drum onthe lower part of the derrick, and a rope extending upward over pulleyP, thence under pulley J, and thence upward over the adjustable pulleyL,and downward for connection with a drill, substantially as set forth.

JAMES W. DRAPER. FREDERICK DRAPER. WALTER ELLSWORTH.

Witnesses:

MARK J. FURRY, T. J. BIRDSALL, H. L. P. HILLYER.

